Date,Open,High,Low,Close,Volume,OpenInterest
20120821,5501,5564,5501,5541,10,13
20120822,5540,5557,5513,5546,19,29
20120823,5565,5580,5480,5490,65,30
20120824,5475,5533,5470,5510,22,30
20120825,5512,5515,5512,5514,2,0